Example usage for javax.swing SwingUtilities computeDifference

Introduction

In this page you can find the example usage for javax.swing SwingUtilities computeDifference.

Prototype

public static Rectangle[] computeDifference(Rectangle rectA, Rectangle rectB) 

Source Link

Document

Convenience returning an array of rect representing the regions within rectA that do not overlap with rectB.

Usage

From source file:org.eclipse.jubula.rc.swing.tester.adapter.JComboBoxAdapter.java

/**
 * @return a rectangle, where the arrow icon is expected.
 *///from w  w w .  ja  va2  s.c om
private Rectangle findArrowIconArea() {
    JComboBox comboBox = m_comboBox;
    Component editor = getComboBoxEditorComponent(comboBox);
    Rectangle r = null;
    if (editor == null) {
        throw new StepExecutionException("could not find editor", //$NON-NLS-1$
                EventFactory.createActionError(TestErrorEvent.COMP_NOT_FOUND));
    }
    Rectangle ra[] = SwingUtilities.computeDifference(comboBox.getBounds(), editor.getBounds());
    if ((ra == null) || (ra.length < 1)) {
        throw new StepExecutionException("could not arrow icon", //$NON-NLS-1$
                EventFactory.createActionError(TestErrorEvent.COMP_NOT_FOUND));
    }
    r = ra[0];
    // find the largest area of the returned rectangles.
    double bestAreaIndex = Double.MAX_VALUE;
    for (int i = 0; i < ra.length; i++) {
        if ((ra[i].height > 0) && (ra[i].width > 0)) {
            double areaIndex = ((double) ra[i].width) / ra[i].height - 1.0;
            if (areaIndex < 0) {
                areaIndex *= (-1);
            }
            if (areaIndex < bestAreaIndex) {
                bestAreaIndex = areaIndex;
                r = ra[i];
            }
        }
    }
    return r;
}

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